4. Describe a practical application of chromatography and give an example that is unrelated to photosynthesis.

Explanation:

It is sometimes used in medicine to examine body fluids. The chemicals of interest (ones that should not be in the body) will separate out differently than the fluids that should be there.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

d. planting trees

the trees take in carbon to make oxygen.